. richard reeve joins us live from mount vernon. >> it was in these woods back in january of 2000 that a young woman was raped, an 18 year-old woman forced against her will at knifepoint. in alexandria, relief that the man in this sketch known as the east coast. this is now under arrest. >> we are happy because they got him. >> they have identified him as aaron thomas. u.s. marshals arrested him at his home friday afternoon. >> i did not know what was going on. >> the neighbors were shocked to learn that he faced sex assault, burglary, and weapons charges in connection with 17 attacks, including 12 rapes in virginia, maryland, connecticut, and rhode island. investigators say dna evidence was crucial in solving these cases. about 12 cases have been linked by dna to the same offender. >> acting on a tip, the fbi put him under surveillance a couple days ago. >> we confirmed that thomas was the east coast. this. and among the 12 cases, an 18- year-old woman raped in these woods. residents who live across the street are grateful. >> that is wonderful that our technology can do this. it